Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quais cidades sediaram conferências sobre o bem social e a IA ética?
 ###Tabelas: 
CREATE TABLE conferences (id INT PRIMARY KEY, name VARCHAR(255), city VARCHAR(255), start_date DATE, end_date DATE); INSERT INTO conferences (id, name, city, start_date, end_date) VALUES (1, 'Social Good Summit', 'San Francisco', '2022-06-01', '2022-06-03'); INSERT INTO conferences (id, name, city, start_date, end_date) VALUES (2, 'Climate Change Tech Conference', 'Vancouver', '2022-07-01', '2022-07-02'); INSERT INTO conferences (id, name, city, start_date, end_date) VALUES (3, 'Accessibility in Tech Conference', 'Toronto', '2022-08-01', '2022-08-03'); INSERT INTO conferences (id, name, city, start_date, end_date) VALUES (4, 'Ethical AI Conference', 'New York', '2022-09-01', '2022-09-03'); INSERT INTO conferences (id, name, city, start_date, end_date) VALUES (5, 'AI for Social Good Summit', 'London', '2022-10-01', '2022-10-03'); INSERT INTO conferences (id, name, city, start_date, end_date) VALUES (6, 'Tech for Social Impact Conference', 'Berlin', '2022-11-01', '2022-11-03'); CREATE TABLE topics (id INT PRIMARY KEY, conference_id INT, title VARCHAR(255)); INSERT INTO topics (id, conference_id, title) VALUES (1, 1, 'Ethical AI in Healthcare'); INSERT INTO topics (id, conference_id, title) VALUES (2, 4, 'Ethical AI for Climate Change'); INSERT INTO topics (id, conference_id, title) VALUES (3, 6, 'Tech for Social Good');
SELECT DISTINCT city FROM conferences JOIN topics ON conferences.id = topics.conference_id WHERE title LIKE '%social%' OR title LIKE '%ethical AI%';